Replaces an std::map with a quichashmap.

The order of the elements in this map does not appear to be important.

PiperOrigin-RevId: 318642670
Change-Id: I1c1bf56c8b5e4960db16a6de71d7f08f280ed6d0

quic/test_tools/quic_session_peer.cc

diff --git a/quic/test_tools/quic_session_peer.cc b/quic/test_tools/quic_session_peer.cc
index ea9dc06..6823691 100644
--- a/quic/test_tools/quic_session_peer.cc
+++ b/quic/test_tools/quic_session_peer.cc
@@ -120,7 +120,7 @@
 }
 
 // static
-std::map<QuicStreamId, QuicStreamOffset>&
+QuicHashMap<QuicStreamId, QuicStreamOffset>&
 QuicSessionPeer::GetLocallyClosedStreamsHighestOffset(QuicSession* session) {
   return session->locally_closed_streams_highest_offset_;
 }